DE4191061C2 - CNC device for controlling several machine tools - Google Patents

Abstract

A main CPU unit and a plurality of CNC units which are provided in a 1: 1 correspondence with machine tools, the main CPU being connected to an external storage device and to an input device. For the modification of the control mode of the machine tools or the machining data for the workpiece, a new system program is downloaded via the RAM of the main CPU unit into the CPU of the CNC unit. The part program containing the machining data, which is normally in the CPU of this CNC Unit is stored, is modified according to this new system program.

Description

This invention relates to a CNC device for computerized numerical control) for control meh rerer machine tools, such as those from the Druckschrift Industrie-Anzeiger 1989, Issue 34, pp. 34-36 be is known. This document describes a CNC device device in which a multibus is used to transfer CPU's from To closely couple CNC units to a main CPU unit which is an external storage device and an input direction for entering operating instructions includes.

As described for example in JP 61-105616-A, is one conventional CNC device for controlling a multi Number of machines arranged so that machine tools with CNC units are connected in a 1: 1 correspondence and  that each CNC unit is connected to a host unit. The data between the CNC units and the Host unit (a cell controller and a pro gram file unit) by means of serial transmission or exchanged over a LAN or the like. The CNC Units and the host unit are each with an ope rator input / output function.

The CNC device generally comprises a microcompu ter, which is why a soft goods of several hundred kilobytes is used. This Software includes a part program designed for machining of a workpiece used with a machine tool contains work data, and a system program for the Control of the movements of the machine tool by the In interpretation of the part program just processed. The Software is usually included in every CNC unit tten ROM and can not be easily modifi be decorated.

For this reason, in a conventional CNC unit, that for controlling a plurality of machine tools is used to replace the ROM when the system pro gram and the part program must be changed. On Another problem with the conventional CNC unit is in that the CPU of the host unit and the respective CNC Units are only weakly coupled, so that at a change system program and the part program Signal exchange and a transfer of programs between the CPU, the host unit and a CNC unit and the host unit and the CNC units at any time have to work in pairs. Hence the transmission area speed for the system program and the parts pro data containing grams between the host unit and each the CNC unit is relatively low. If any  of machine tools due to a bug in the system pro gram or can no longer work in the part program the maintenance of the recovery program normal operation complicated.

The document DE 34 02 706 A1 shows a device for Control of machine tools and robots, the Set up at least one numerical control and counter also has an adaptation control and for all taxes a common read-write memory provided is. The machine tools connected to the facility and robots are written according to the program in the Read memory controlled. Switching stages are also featured see the possible bus conflicts and avoid data exchange between the read-write memory and the control coordinate efforts.

VDI-Z 131 (1989) No. 7, pp. 37-43 relates a DNC concept for active function control and execution Central instructions from the host or master computer by machine tools or robots.

The document US 4 138 718 shows a numerical control system, in which system programs from an external memory from a main CPU unit to a CNC unit become.  

The publication VDI-Z 125 (1983) No. 14, pp. 575-578 shows a publication on DNC functions in numerical Controls. In the NC memory are next to the part program tool data still saved. The storage takes place in the NC machine and not in a shared RAM.

In particular, the aforementioned prior art cannot professional transfer of machining and setting conditions from one CNC unit to another CNC unit ren. This means, for example, that with a transfer one Ver workpiece from one machine tool to another Bound transfer of the associated parts program difficult.

The object of the invention is to provide a CNC control device to create several machine tools that are easy and quick transfer of the system program and parts programs, and thus a high degree of flexibility of workpiece machining.

The object is achieved according to the features of claim 1. The dependent claims relate to advantageous execution form the invention.

A CNC device for controlling a plurality of Ma machines comprises a main CPU unit with a RAM, one Multiple CNC units to drive and control the machine machines, an external one connected to the main CPU unit Storage device for storing system programs for the control of the machines, part programs and research data, a cathode ray tube (CRT) for display the status of the with the  Main CPU unit connected to CNC units and one with input device for the main CPU unit entering between the CNC units and the main CPU unit to move operating instructions, being in the this CNC device, the main CPU unit and the CNC Ver all units together via a bus line are bound and being a RAM from the main CPU unit and shared by the CNC units.

The RAM mentioned above is such that it is a more number of memory areas which corresponds to the number of CNC units correspond.

The input device mentioned above is such that that it can input command signals to the majority of the Competitive drive and control of CNC units.

Furthermore, the above-mentioned input device can be so forms that they are the command signals for the tax Most of the CNC units on a time series basis to enter different types of machines to control current.

When the control content of a CNC unit is changed can do this by downloading a system programs for the CNC unit of the above-mentioned ex internal storage device can be executed in the RAM.

The RAM is also designed to be part of the Sub-programs optionally processing conditions and on Save control conditions in the majority of the machines can.

In the manner described, the system is the main CPU  Unit and the CNC units ready for operation. If that System of CNC units is activated, the sy master programs for the control of the machines from the ex internal memory device via the RAM into the CPU's CNC units downloaded. If the main CPU unit and the CNC units are ready for operation An optional CNC unit was selected for the input device. When this CNC unit is selected, the main CPU the main CPU unit started up, causing a Part program for the control of the machining operation the machine from the external storage device wear and is stored in the RAM of the main CPU unit.

Then the CPU of the CNC unit is put into operation where Then the CNC unit saved the part program stored in RAM reads over the bus line and the machine according to controls the system program so that the machine loads machining of the workpiece in accordance with the part program leads.

If a system program for the competitive control of a variety of CNC units Most CNC units are entered competitor driven and controlled.

If also part programs from the input device for controlling different types of machines on one A time series basis is entered, a plurality work of CNC units in a competitive manner, whereby the ver different machines are driven competitively.

If the maintenance of the current machining conditions and setting conditions of the operating Ma machine is desired, these can be saved in RAM  become.

The software used in the present invention summarizes a part program that when cutting off a work piece of machining data used by a machine ten contains, and a system program for the control of the Movement of the machine through the interpretation of the straight completed part program. At least the system pro Programs that correspond to the CNC units are generated by the external memory device via the RAM to the CNC-On downloaded when the power supply to the entire CNC device is switched on. In this The machining conditions and the on setting conditions of those stored in the CNC units Part programs modified by the system programs the. If, for example, the workpiece is from a Machine that due to a malfunction of the system pro gram or part program is not operational, to another machine is moved to the same bear processing operation, or if a particular one Machining operation to another machining opera tion is changed, a system program for this Purpose from the external storage device to the concerned fende machine downloaded, using this Sy stem program, the sub-program is modified.

The system program can move the corresponding Control the machine while the part program is in accordance with the Carry out processing to be carried out for new processing data can leave.

As mentioned above, similar workpieces can be the same can be processed early on many machines. Moreover different types of workpieces can be meh  other machines can be processed. Likewise, you can some of the many machines are operated.

Each CNC unit only has to have a minimum number be equipped by peripheral facilities while the external storage device, the input device and the display device of all CNC units can be shared so that the entire CNC Setup simplified in terms of its configuration can be.

Since RAM is contained in the main CPU unit, which due to changes in the system program or in Part program delivered data only in one direction sends, so that it from RAM over the bus to the be hitting CNC units are moved, so that Pro gram changes can be carried out very quickly.

Incidentally, it is found that the above-mentioned Maschi machine tool for machining the workpiece NEN machines, construct tion machines, etc. include.

As can be seen from the foregoing description, be sits the CNC device for controlling a multi number of machines according to the present invention sufficient universal usability for machining specifications of various workpieces len.

BRIEF DESCRIPTION OF THE FIGURES

Fig. 1 is a block diagram approximately form an exporting a CNC device for controlling a plurality of machines according to the present invention;

Fig. 2 is a front view of the panel;

Fig. 3 is a diagram showing the contents of the RAM;

Fig. 4 is a flowchart showing the operation of the main CPU;

Fig. 5 is a flowchart showing the operation of the CPU of a CNC unit; and

Fig. 6 & 7 are flow charts showing the operation of the Her under loading a system program into a CNC unit.

PREFERRED EMBODIMENT OF THE INVENTION

Fig. 1 shows a CNC device 1 a for controlling a plurality of machines according to the present invention.

In Fig. 1, reference numeral 1 denotes a main-CPU unit, ..., 12 n is connected via a bus line 11 with CNC units 12 a.

The reference numeral 2 designates a control panel on which there are CNC selection keys 21 a, 21 b, ..., 21 n and a work sequence start key 22 , as shown in FIG. 2.

The reference numeral 3 denotes a cathode ray tube (CRT), which indicates the status, the machining conditions, the setting conditions, the part programs, etc. of the CNC units 12 a, ..., 12 n.

Numeral 4 denotes a keyboard used for manual input of data input commands (MDI commands), etc.

Reference numeral 5 denotes a hard disk in which system programs and part programs, machining conditions and the like are stored.

Reference numeral 6 designates a diskette in which part programs are stored.

The reference numeral 7 denotes a punched tape, in which a parts program is shown.

Reference numeral 8 denotes an interface which is used for communication with a host unit (for example a personal computer or a host computer) and which in particular represents a device which procure in accordance with the RS-232C standard agreed by the EIA is.

An external storage device is formed by a host unit, which is connected to the hard disk 5 , the disk 6 , the paper tape reader 7 and the interface 8 .

An input device is used for the input of operating commands which are moved between the CNC units and the main CPU unit 1 , and is formed by the control panel 2 , the CRT 3 and the keyboard 4 .

Reference numeral 9 denotes a main CPU which controls the input / output device, which contains the control panel 2 , the CRT 3 , the keyboard 4 , the hard disk 5 , the diskette 6 , the paper tape reader 7 and the interface 8 .

Reference numeral 10 denotes a RAM, which stores commands and data from the main CPU 9 and also commands and data from the CPU's 13 a, ..., 13 n of the CNC units 12 a, ..., 12 n, the are connected via the bus line 11 with the RAM, stores. The RAM will be described in more detail later.

The bus line 11 can be used to form a multiprocessor structure, but it cannot be used simultaneously by the CPU's 13 a, ..., 13 n of the CNC units. For example, this bus line 11 has a shape that is similar to the Multibus from Intel (IEEE-796).

The main CPU 9 and the RAM 10 are housed in the main CPU unit 1 .

The CNC units 12 a, ..., 12 n, on which the CPU's 13 a, ..., 13 n of the CNC units are attached, are closely coupled to the main CPU unit 1 via the bus line 11 . The CPU's 13 a, ..., 13 n of the CNC units control the CNC units 12 a, ..., 12 n.

The reference numerals 14 a, ..., 14 n designate driver units which drive the motors of the corresponding machine tools 15 a, ..., 15 n by commands from the CNC units 12 a, ..., 12 n, the Machine tools 15 a, ..., 15 n can be used for the machining of workpieces.

The internal structure of the RAM 10 is divided into CNC unit areas 30 a, ..., 30 n, which correspond to the CNC units 12 a, ..., 12 n, as shown in Fig. 3. Whether in FIG. 3 the memory areas of the CNC unit areas 30 a, 30 b, ..., 30 n of the CNC units 12 a, ..., 12 n are not provided with all the reference numerals is the result an uninterrupted citation of all reference signs display output areas 32 a, ..., 32 n, part program input / output areas 33 a, ..., 33 n, processing condition areas 34 a, ..., 34 n, setting condition areas 35 a , ..., 35 n and download areas 36 a, ..., 36 n for downloading the system programs for the CNC units 12 a, ..., 12 n.

The operating input areas 31 a, ..., 31 n are memory areas for storing commands from the operator who are input from the control panel 2 . These operating input areas 31 a, ..., 31 n can be accessed by the CPU's 13 a, ..., 13 n of the CNC units.

The display output areas 32 a, ..., 32 n are memory areas for storing the display of the part programs supplied by the hard disk 5 , the diskette 6 , the paper tape reader 7 and the interface 8 on the CRT 3 . In addition, the display output areas 32 a, ..., 32 n provide storage areas for storing the operating conditions of the machine tools 15 a, ..., 15 n, ie the CPU's 13 a, ..., 13 n installed in the CNC units specified conditions of the CNC units 12 a, ..., 12 n.

The part program input / output areas 33 a, ..., 33 n are memory areas for storing part program search commands from the CPU's 13 a, ..., 13 n (for example 13 a) of the CNC installed in the CNC units. Units 12 a, ..., 12 n by means of a selection command signal set by the main CPU 9 with respect to the CNC units 12 a, ..., 12 n (for example 12 a).

The part program input / output areas 33 a, ..., 33 n also serve as memory areas for storing the part programs of those machine tools that are currently performing machining.

The machining condition areas 34 a, ..., 34 n are storage areas for storing the machining conditions (for example, the transport table feed speed, the voltage for the electrical discharge for the machining), which are used in the machining of the next workpiece of the same type.

The setting condition areas 35 a, ..., 35 n are storage areas for storing the setting conditions (for example, skipping a label (label skip)) of the machine tool currently executing a machining operation, which are used for the next machining of a workpiece of the same type.

The download areas 36 a, ..., 36 n are memory areas for temporarily storing the system programs read from the external memory device (in particular the hard disk 5 ) when the CNC units 12 a, ..., 12 n are ready for operation (for example 12a) is set in which no system program is stored.

In this way, the memory areas for the CNC units 12 a, ..., 12 n in operating input areas 31 a, ..., 31 n, in display output areas 32 a, ..., 32 n, in part program input / Output areas 33 a, ..., 33 n, divided into processing condition areas 34 a, ..., 34 n, into setting condition areas 35 a, ..., 35 n and into download areas 36 a, ..., 36 n. If the system programs are downloaded into the corresponding CNC units 12 a, ..., 12 n, they are temporarily stored in the download areas 36 a, ..., 36 n and then to the CPU's 13 a installed in the CNC units , ..., 13 n of the CNC units 12 a, ..., 12 n transmitted. If the part programs are downloaded into the corresponding CNC units 12 a, ..., 12 n, they are temporarily stored in the part program input / output areas 33 a, ..., 33 n and then to the corresponding in the CPU's 13 a, ..., 13 n attached to the CNC units.

An embodiment of the present invention will now be described with reference to the flowcharts of FIGS . 4 and 5.

Power is supplied to the main CPU unit 1 and to the CNC units 12 a,... 12 n, which are connected to the main CPU unit 1 via the bus line 11 , in order to make the system ready for operation .

The main CPU 9 starts operating according to the flowchart of FIG. 4. FIGS. 4 and 5 are flowcharts of data processing for changing the machining contained in a part program. In step 100 , the operator actuates the CNC selection keys 21 a, ..., 21 n of the control panel 2 , whereupon a decision is made as to which of the CNC units 12 a, ..., 12 n is to be controlled. In this step 100 , the decision is repeated until one of the CNC units 12 a, ..., 12 n is selected. When the Bedie voltage person one of the CNC selection buttons 21 a, ..., 21 n on the control panel 2 selects and presses (for example 12 a selected) is selected one of the CNC units (for example 12 a), whereupon the procedure advances to step 110 continues. In step 110, the main CPU 9 stores instruction data for the selection of the CNC unit 12 a in the RAM 10 . If the command data for the selection of the CNC unit 12 a is stored in the operating input area 31 a of the RAM 10 , the main CPU 9 decides in step 120 whether a part program search command for driving the machine tool 15 a by the in the CNC Unit attached CPU 13 a has been transferred from the CNC unit 12 a in the part program input / output area 33 a of the RAM 10 .

On the other hand, the command data for selecting the CNC unit are stored 12a in step 110 in the operation input portion 31 a, the installed in the CNC unit CPU 13 starts a the CNC unit 12 a that the loading drive input area 31 a in fixed time intervals has monitored to operate according to the flow chart of FIG. 5. More specifically, as shown in Fig. 5, read in the CNC A standardized Inappropriate CPU 13 a stored in the operation input portion 31 a of the RAM 10 the instruction information for the selection of the CNC unit 12 a and determines that the CNC unit 12 a , to which the CPU 13 a belongs, has been chosen. Then, in step 210, the CPU 13 a installed in the CNC unit transmits a part program search command for driving the machine tool 15 a from the CNC unit 12 a into the parts program input / output area 33 a of the RAM 10 .

If the part program search command has been stored in the part program input / output area 33 a, the operation returns to the procedure of FIG. 4, ie that in step 120 the main CPU 9 confirms the presence of the part program search command, whereupon in step 130, the main CPU 9 in accordance with the part program search command reads out the part program from the external storage device (hard disk 5, disk 6, tape reader 7 or interface 8) and the part program in part program input / output portion 33 a of the RAM 10 saves. After the part program has been written into the part program area 33 a, the contents of the part program stored in the display output area 32 a are displayed on the CRT 3 .

In the next step 150 , a decision is made as to whether a workflow start button 22 on the control panel 2 has been switched on. This workflow start key is a key that the operator operates to read the part program into the CNC unit 12 a. If it is decided in step 150 that the start key has been pressed's workflow 22, a start command's workflow is stored in step 160 in the operation input portion 31 a of the RAM 10 degrees.

When the operation start command from the main CPU 9a has been stored in the operation input section 31, the operation goes to the procedure in Fig. 5, wherein, in the step 220, mounted in the CNC unit CPU 13 a decisive det whether the workflow - Start command has been saved. If it is decided in step 220 that the part program has been written into the part program input / output area 33 a of the RAM 10 , the part program is stored in the display output area 32 a of the RAM 10 in step 230 .

In step 240 , it is decided whether the workflow start command has been entered from the workflow start key. When it is confirmed in step 240 that has been input, the operation start instruction, the attached in the CNC unit CPU 13 a 22 are give NEN operation start command read at step 250 in accordance with the part program to the operation start button. In step 260, the CPU 13 a for driving drives a driver unit 14 of a motor to the machine tool 15 a from which the workpiece is machined to operate.

In step 270 it is decided whether the machining operation has ended; when it is decided that the processing operation has been completed, the CPU 13 a in the step 280 stores a Werkstückbearbeitungsende- command in the operation input portion 31 a of the RAM. As a result, the operation of the CPU 13 a installed in the CNC unit according to the flow chart of FIG. 5 is ended.

If the workpiece machining end command is stored in the RAM, the operation returns to the procedure of FIG. 4, that is, that the main CPU 9 confirms the presence of the workpiece machining end instruction in step 170 and in step 180 that in the operation input area 31 a the RAM 10 stored command data for the selection of the CNC unit 12 a clears, whereby the operation of the main CPU 9 according to the flowchart of Fig. 4 is ended.

In this flowchart, the flow of control of the CNC unit 12 a is shown so that the description is facilitated. In fact, the software of the main CPU 9 has a multitask structure for the individual CNC units 12 a, ..., 12 n, so that the operation is started with any of the CNC units 12 a, ..., 12 n can be.

Further, the CRT 3 is such that it indicates ... n 13 and the current changing from one moment to the next to the selected condition of the CPU mounted in the CNC units CPU's 13 a,.

If the machine tools 15 a, ..., 15 n connected to the CNC units 12 a, ..., 12 n are all of the same type, e.g. B. are drilling machines can, by simultaneous selection of the CPU's in the CNC units 13 a, ..., 13 n of the CNC units 12 a, ..., 12 n, the CNC units 12 a, .. ., 12 n corresponding CNC unit areas 30 a, ..., 30 n are caused to perform the same operation.

If the machine tools 15 a, ..., 15 n connected to the CNC units 12 a, ..., 12 n are of different designs, for example die milling machines working by means of electrical discharge and wire cutting machines working by means of electrical discharge, these can be applied to the operated in the same way as described above. The part programs to be imported in this case must be suitable for the individual machine tools.

The system programs are loaded regions using the down 36 a, ..., 36 when the system is powered n downloaded. The system programs to be downloaded can be selected either by the main CPU 9 or by the CNC units 12 a, ..., 12 n.

The modification of the system program will now be described with reference to the flowcharts of FIGS . 6 and 7. The flowchart of FIG. 6 shows the operation of the main CPU 9 . In contrast, the flow chart of FIG. 7 shows the operation of any of the CPU's 13 a,..., 13 n installed in the CNC units. Both flow charts of FIGS . 6 and 7 show the operations which are in principle the same as in FIGS Flow charts of FIGS . 4 and 5 occur.

In step 300 , the main CPU 9 decides whether a system program modification request has been issued by the input device. If the decision is "YES", the main CPU 9 requests in step 310 that a modified system program should be read.

If it is found in step 300 that the modification request has been issued, one of the CPU's 13 a,..., 13 n installed in the CNC units begins to work according to the flow chart of FIG. 7. More specifically, a system program read request is issued in step 400 , whereupon the read request is set in step 410 . The operation now returns to the steps in FIG. 6. In step 320 , a decision is made as to whether a read request has been set; if the read request has been set, a system program is read out from the external storage device in step 330 . In step 340 , the system program is downloaded to any of the download areas 36 a, ..., 36 n of the RAM 10 . In step 350 , an end of read status bit is set. If the read end status bit is set, a decision is made in step 420 of FIG. 7 whether the read end status bit is active; if the end of read status bit is active, the read request is reset in step 430 . Therefore, the decision in step 360 of FIG. 6 is that the read request has been reset, which is why the read end status bit is reset in step 370 . In step 380 it is decided whether the reading of the system program has ended; if the decision is "YES", the reading of the system program is complete.

On the other hand, in step 440 of FIG. 7, the system program stored in one of the download areas 36 a, ..., 36 n of the RAM 10 is read into the corresponding one of the CPU's 13 a, ..., 13 n installed in the CNC units . In step 450 , a decision is made as to whether the reading into the corresponding CPU 13 a,..., 13 n installed in the CNC units has ended. When the reading process is finished, the system program read into the above-mentioned CPU of the CPU's 13 a, ..., 13 n installed in the CNC units is processed, so that the CPU's 13 installed in the CNC units into this CPU a, ..., 13 n a part program that has already been read, more precisely the machining data containing the machining conditions and the setting conditions are modified. Thus, the machine tools 15 a, ..., 15 n are operated in accordance with the modified programs and the workpieces are processed in accordance with the machining data of the modified partial programs.

The functions of the system program include the control of the machining data, ie the machining conditions and the setting conditions in the sub-program to control the operation of the machine tools 15 a, ..., 15 n, and the display of the conditions of the machine tools that carry out the machining . The part program contains data relating to the movement in the X, Y and Z directions and temperature data for heating and cooling.

Although not shown in the embodiment, each machine can be provided with a control panel, if necessary, also the engine can from with the CNC units 12 a, ..., 12 n connected switching are controlled panels, without departing from the Main CPU 9 to be controlled.

Since the machining condition areas 34 a, ..., 34 n and the setting condition areas 35 a, ..., 35 n are provided in the CNC unit areas 30 a, ..., 30 n in the RAM 10 , it is possible To provide an arrangement such that the main CPU 9, the contents of the machining conditions 34 a, ..., 34 n and the setting condition areas 35 a, ..., 35 n of a CNC unit area in the corre sponding Moves areas of another CNC unit area or transfers this content to the external storage device or reads the content of some of the processing condition areas 34 a, ..., 34 n or the setting condition areas 35 a, ..., 35 n and reads them stores 30 a, ..., 30 n in the corresponding areas of selected CNC unit areas.

In addition, the multibus from Intel can be used for the bus line of this embodiment, which is designed in such a way that it contains data between the memory units which are contained in the CPU's in the CNC units 13 a, ..., 13 n , transmits directly.

This invention is used to operate a plurality of Machine tools used in the process for the Machining of mechanical and electrical parts arranged are not. The CNC device according to the present Er is suitable for parts according to different Specifications on many machine tools through soft to edit software programs that operate the factory machine tools can change as desired, and contributes to ver improving productivity in the automotive industry, the heavy machinery industry and electrical machinery  industry at.

Claims (3)

1. CNC device for controlling several machine tools ( 15 a ... 15 n), with

• 1. a main CPU unit ( 1 ) with a RAM ( 10 ), an external memory device ( 5-8 ) and an input device ( 4 ) for entering operating instructions into the main CPU unit ( 1 ),
• 2. several CNC units ( 12 a ... 12 n) for controlling the machine tools ( 15 a ... 15 n), which are connected to the main CPU unit ( 1 ) via a bus ( 11 ) used in common are,

in which

• 1. the RAM ( 10 ) is shared between the main CPU unit ( 1 ) and the CNC units ( 12 a ... 12 n),
• 2. the external memory device ( 5-8 ) contains part programs with workpiece-specific machining data and system programs with data for motion control for the CNC units ( 12 a ... 12 n),
• 3. on request by the input device ( 4 ) a parts program and / or a system program from the external memory device ( 5-8 ) via the RAM ( 10 ) into a CPU ( 13 a ... 13 n) of the corresponding CNC unit ( 12 a ... 12 n) can be downloaded, the CPUs of the corresponding CNC units ( 12 a ... 12 n) being closely coupled to the main CPU unit ( 1 ) via the bus ( 11 ),
• 4. After switching on the CNC device, system programs are downloaded from the external memory device ( 5-8 ) via the RAM ( 10 ) into CPU's ( 13 a ... 13 n) from corresponding CNC units ( 12 a ... 12 n) become,

and

• 1. the RAM ( 10 ) memory areas ( 30 a ... 30 n) for each of the CNC units ( 12 a ... 12 n) and each of these individual memory areas ( 30 a ... 30 n) each contain a download area ( 36 a ... 36 n) for the temporary storage of system programs, a part program input / output area ( 33 a ... 33 n) contains a processing condition area ( 34 a ... 34 for the temporary storage of part programs n) and a setting condition area ( 35 a ... 35 n), the machining conditions area ( 34 a ... 34 n) and the setting condition area ( 35 a ... 35 n) are designed such that their contents from a memory area ( 30 a ... 30 n) of one of the CNC units ( 12 a ... 12 n) to a memory area ( 30 a ... 30 n) of another CNC unit ( 12 a ... 12 n) are transferable.

2. CNC device according to claim 1, characterized in that a system program for a CNC unit ( 12 a ... 12 n) is downloaded into the RAM ( 10 ) and a part program for the machining of a workpiece modified according to this system program can be. 3. CNC device according to claim 1 to 2, characterized in that the system programs from the external SpeI chereinrichtung ( 5-8 ) in the in the CNC units ( 12 a ... 12 n) arranged CPU's ( 13 a. .. 13 n) are downloaded and the machining data in the part programs, which are stored in the CPU's in the CNC units ( 12 a ... 12 n) ( 13 a ... 13 n), according to these System programs are modified.